Adult PC Game: How Bad Can It Be? Ch.3 by Doshima Win/Mac/Android Archive

You have it all, a CEO position at one of the most successful companies in the nation, a beautiful and loyal girlfriend who would do anything to make you happy, a boss who took you under his wing after your father died when you were a child. But all of that can change when, unexpectedly, your boss asks you for a favor that you can't reject. The only thing left to know is "How Bad Can It Be?".
WARNING: Sharing the main LI is unavoidable, however, the future NTR path is going to be completely avoidable based on your choices.